This lot of 2 heater elements from Dayton Electric, style M36, are brand new and have never been used. The elements have a tolerance rating of ±2% and are suitable for use in a variety of electronic components and semiconductors. These heater elements are made specifically for use in inductors, coils, and filters, making them an ideal choice for anyone in need of reliable, high-quality components. Purchase with confidence knowing that you are getting a brand-new product that is guaranteed to meet your needs.